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/*
* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* Object mapping. A very simple implementation.
*/
#include <stdio.h>
#include <stdlib.h>
#include "map.h"
#define MAXMAPS 16
#define MAXKEYS 16
static void *mapSpace[MAXMAPS*MAXKEYS*2];
static int lastMap = -1;
void *
createMap()
{
if (++lastMap >= MAXMAPS) {
fprintf(stderr, "FATAL: too many object maps\n");
exit(1);
}
return mapSpace + lastMap * MAXKEYS * 2;
}
void
putMap(void *map, void *key, void *val)
{
void **ptr = (void**)map;
int i;
for (i=0; i<MAXKEYS; ++i) {
if (ptr[2*i] == NULL) {
ptr[2*i] = key;
ptr[2*i+1] = val;
return;
}
else if (ptr[2*i] == key) {
ptr[2*i+1] = val;
return;
}
}
fprintf(stderr, "FATAL: too many object map keys\n");
exit(1);
}
void *
getMap(void *map, void *key)
{
void **ptr = (void**)map;
int i;
for (i=0; i<MAXKEYS; ++i) {
if (ptr[2*i] == NULL) {
return NULL;
}
else if (ptr[2*i] == key) {
return ptr[2*i+1];
}
}
return NULL;
}
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